\name{hsisob}
\docType{data}
\alias{hsisob}
\title{Topo: Hecate Strait Isobaths}
\description{
  PolySet of polylines that trace the 20m and 50m isobaths in Hecate Strait (BC).
}
\usage{data(hsisob)}
\format{
  Data frame comprising 5 columns: \cr
    \code{PID....}{primary polygon ID} \cr
    \code{SID....}{secondary polygon ID} \cr
    \code{POS....}{position of each vertex within a given polygon} \cr
    \code{X......}{longitude coordinates} \cr
    \code{Y......}{latitude coordinates} 
}
\details{
  The 3,151 vertices trace 2 contours. \code{PID}s are either \code{20} or \code{50}.
}
\note{
  Contours originally in ArcView as raster-interpolations of NOAA satellite 
  bathymetry data, were exported using Norm Olsen's Visual Basic tool called 
  \code{Shp2PBSMap} to an ACCESS database, consarnit.
}
\source{
  Norm Olsen, Pacific Biological Station, Nanaimo BC
}
\references{
  \url{http://ibis.grdl.noaa.gov/cgi-bin/bathy/bathD.pl}
}
\examples{
\dontrun{
pbsfun=function(){
  oldpar=par(no.readonly=TRUE); on.exit(par(oldpar))
  if (!require(PBSmapping, quietly=TRUE)) stop("`PBSmapping` package is required")
  data(nepacLL,hsisob,envir=.PBSdataEnv)
  pdata=attributes(hsisob)$PolyData
  xlim=extendrange(hsisob$X,f=0.2); ylim=extendrange(hsisob$Y,f=0.1)
  plotMap(nepacLL,xlim=xlim,ylim=ylim,col="aliceblue")
  addLines(hsisob,col=c("red","blue"),lwd=1)
  addLabels(pdata,adj=0,polyProps=pdata)
  invisible() }
pbsfun()
}
}
\seealso{
  \code{\link{isobath}}, \code{\link{hsgrid}}
}
\keyword{datasets}
